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From "Gary Dusbabek (JIRA)" <j...@apache.org>
Subject [jira] Created: (CASSANDRA-1389) Schema migrations are noisy
Date Fri, 13 Aug 2010 18:22:16 GMT
Schema migrations are noisy
---------------------------

                 Key: CASSANDRA-1389
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1389
             Project: Cassandra
          Issue Type: Improvement
          Components: Core
    Affects Versions: 0.7 beta 1
            Reporter: Gary Dusbabek
            Assignee: Gary Dusbabek
            Priority: Minor
             Fix For: 0.7 beta 2


Currently, when a schema update happens on a node, it calls Migration.announce(), which sends
a message to every live node announcing its version.  This creates a terrible amount of noise
(n^2 messages) in fairly rapid succession.

I think announcing should only be done as part of a) a client request or b) loadSchemaFromYaml.
 All other migrations (as a result of receiving a message) should just keep quiet after applying
the migration.

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